Composite card flat



Patented Aug. 7, 1951 UNITED STATES PATENT OFFICE COMPOSITE CARD FLATApplication May 29, 1948, Serial No. 30,133

1 Claim. 1

This invention relates to card flats as used in revolving flat cardingmachines. Such flats support portions of card clothing which coact withthe rotating carding cylinder. The flats are of very substantial length,and unusual strength and rigidity is necessary for their successfuloperation.

It is the object of my present invention to provide a composite cardfiat in which these qualifications are exceptionally well attained. Tothe accomplishment of this general object, I provide a card flat havinga strong and rigid structural steel body portion and having separatelyformed and attached end portions which provide the required bearing andguiding surfaces.

My invention further relates to arrangements and combinations of partswhich will be hereinafter described and more particularly pointed out inthe appended claim.

A preferred form of the invention is shown in the drawings, in whichFig. 1 is a partial plan view of a composite card flat embodying myinvention;

Fig. 2 is a side elevation thereof, with certain parts shown in section;

Fig. 3 is an end view, looking in the direction of the arrow 3 in Fig.2; and

Fig. 4 is a transverse sectional elevation, taken along the line 4-4 inFig. 2.

Referring to the drawings, my improved card flat comprises a structuralsteel body portion H] which is preferably of the commercial T sectionshown in Fig. 4. Separately formed end portions or seats I2 are securedto the two ends of the body portion l0, and the card clothing C may beattached to the top surface I4 01 the body member I!) in any convenientmanner, as by clamping strips l5 (Fig. 3).

The end portions or seats I2 may conveniently be cast or molded fromsintered or powdered metal and are preferably of more or less porousconstruction, so that they may be impregnated with a suitable oil orother lubricant.

Curved guiding surfaces IE on the seats 12 engage corresponding flxedsurfaces in the carding machine and guide the flats in their desiredspaced relation to the carding cylinder. Studs I8 2 are provided forattaching the flats to suitable transporting chains.

The end of the upright middle flange Illa of the steel body member In ispreferably cut away as indicated at 20 in Fig. 2, and each end portionor seat I2 is secured to its body portion In by welding or brazing alongthe surfaces 20, 2| and 22 (Fig. 2). A firm and secure assembly of thethree parts of each card flat is thus attained.

The structural steel body portion I0 is of much more firm and rigidconstruction than the cast iron construction previously commonly used,and the end portions or seats [2 may be economically formed and may bemade of the metal which is best adapted to their intended purposes.

In case one of the seats I2 is broken or otherwise damaged, it may beremoved and replaced, whereas with the previous construction the entireflat had to be discarded.

Having thus described my invention and the advantages thereof, I do notwish to be limited to the details herein disclosed, otherwise than asset forth in the claim, but what I claim is:

A composite card flat comprising a structural steel T-bar and pro-formedend seating members rigidly and permanently secured to the ends of saidT-bar, the end portions of the middle flange of said T-bar beingentirely cut away to provide fiat seating surfaces for said end members,and said end members being secured in abutting relation to said fiatsurfaces and to the transverse end faces of said T-bar and said middleflange.

FREDERIC E. BANFIELD, JR.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,097,254 Platt Oct. 26, 19372,496,765 Williams Feb. '7, 1950 FOREIGN PATENTS Number Country Date11,924 Great Britain of 1894

